<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		.box,.box1{
			width: 100px;
			height: 100px;

		}
		.box{
			background: red;
			position: fixed;
			left:2px;

		}
		.box1{
			background: green;
		}


	</style>
</head>
<body>
	<!-- <div class="box"></div>
	<div class="box1"></div> -->
	<span class="box"></span>

</body>
</html>